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3 years ago

Which of the reactions are spontaneous (favorable)?

Chemistry

1 answer:

dexar [7]3 years ago

7 0

Answer: Reactions: A, B and F

Explanation: Gibbs Free Energy, symbol G, combines Enthalpy (sum of internal energy) and Entropy (measure of how much the energy of atoms and molecules become spread out in a process).

The change in free energy (ΔG) is the sum of enthalpy and the product of temperature and entropy of the system.

With free energy, it is possible to determine if a reaction is spontaneous, i.e., happens wthout external energy, or non-spontaneous.

If ΔG is negative, reaction is spontaneous. If ΔG is positive, reaction is non-spontaneous.

Analysing each ΔG of the reactions above, reactions A, B and F's Gibbs Free energy are negative, so these 3 are spontaneous.

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Which compound is produced when HCl(aq) is neutralized by Ca(OH)2(aq)?

kiruha [24]

Answer: The correct answer is Option 1.

Explanation:

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Here, HCl is an acid and $Ca(OH)_2$ is a base. When these two compounds react, the salt obtained is calcium chloride.

The equation for the above reaction is given by:

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Hence, the correct answer is Option 1.

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Explanation:

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DanielleElmas [232]

Answer:

74.4 ml

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C₆H₈O₇(aq) + 3NaHCO₃(s) => Na₃C₆H₅O₃(aq + 3CO₂(g) + 3H₂O(l)

Given 15g = 15g/84g/mol = 0.1786mole Sodium Bicarbonate

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Therefore, for complete reaction of 0.1786 mole NaHCO₃ one would need 1/3 of 0.1786 mole citric acid or 0.0595 mole H-citrate.

The question is now what volume of 0.8M H-citrate solution would contain 0.0595mole of the H-citrate? This can be determined from the equation defining molarity. That is => Molarity = moles solute / Liters of solution

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3 years ago

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Rama09 [41]

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